Method of staining glass



J. W. HASBURG.

METHOD-0F STAINING GLASS.

APPLICATION FILED JUNE 18. 1919.

1,328,833, Patented Jan. 27,1920

l V/ MM (v Wig composition was applied.

,- UNITED sT Es PATENT OFFICE.

mm: w. nnsnune, or cIIIcAGo, ILLINOIS.

- Inn rnon or srnmme crass.

To all whom it may concern:

Be" it known that I, JOHN W. HASBURG, a citizen of the" United States, residing at Chicago, county of Cook, State of Illinois, have invented a certain new and useful-Improvement in Methods of Staining Glass, and declare the following to be 'a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, whichform a part of this specification.

Glass stainingjis commonly practised by coating suchparts of the piece of glass or ceramic ware, as it is desired to color, with a composition applied in a plastic or semi-liquid state. by means of a brush or otherwise; the coated ware being then baked or burned in a suitable Inuflle in a proper p manner. After burning, the composition is washed ofi the ware, leaving a stain or color in those portions of the ware to which the These coating compositions are usually made from a clayey material, such.as-yellow ocher, metallic salts or bases, charcoal, glucose, or

molasses and enough water to give a creamy consistency to' the composition. so that it Furthermore,

can be applied .to the ware with a brush,

likea paint. 7 v The foregoing method produces a very uniform and flat tint of color on the ware. it is of no consequence whether or not the coating be evenly applied because a even staining effect. seems to obtained e enthough the coating of staining material varies greatly in thickness at different points. Consequently it is not possible to work out designs and vary the decorative effect from a uniform flat tint by making the coating of staining. material thicker at some points than at others.

(gyfyinfiengion has for its olnfit so to m 1 -t e ore ing rocess as' permit designs and van gateti color effects to be pro need on glass and glazed 'ceramlc ware.

'I-n carrying the ware, v with a foundation material and then apply metallic salts or bases in any desired varieout my invention I first coat coating. The ingredients of the foundation material andthe v hicle carrying the metallic salts or bases are so chosen that the metallic salts or bases will soak properly into the foundation material; the extent and Specification of Letters Patent.

or the parts thereof to be treated,

directly upon the character of the impregnation depending upon the strength, manner and formof application of the salts or bases to the foundation material. The foundation material may be'any of the usual clay-like coloring compositions or be any other suitable material, depending upon the nature of the work. The foundation coating is dried more or less before the coloring salts or bases are applied, the work foundation materials.

If the foundation. coating is intended simply to serve as an agent for holding the elements afterward applied for decorative purposes it may conveniently be made 'by mixing powdered ocher and charcoal with sufficient' glucose to make a paste, about four arts of ocher being used to one part of charcoal. If the foundation coatin is intendedto give a tint to the ware, a meta lie salt such for example, ascopper sulfate may be added of copper sulfate being mixed with four parts of ocher, one part of charcoal and sulfioie'nt glucose'to make a paste. The ingredients for the foundation coating are preferably ground in water to a smooth paint.

The materials for application to the foundation coatings may be dissolved in'or mixed with water, alcohol, turpentine or other suitable liquid.

By my improved method artistic decorations may be produced in great variety in monotone or in a combination of colon -in a single burning, since all of the coloring' salts or bases may be applied before a burning operation, and therefore a sin le burning operation will suffice even thoug a decoration be worked out in a plurality of colors.

In the accompanying drawin I give an illustration of the manner in w ich my invention may be carried out; In said drawhe bowl after the burning operation, and

after the coati layer has been removed.

Referring tot e drawing, 1 represents a depending upon the character of Y and the nature of: the coloring and I PatentedJ an. 27, 1920. Application filed June 18, 1919. Serial No. 305,158.

bowl of Fig. 1 I

piece of glass or glazedceramic Ware. 7

There is first applied to the member 1 a trated, there is a set design, 3, placed around the bowl near the top, while a graduated application of coloring material is applied to the lower portion or base of the bowl as indicated at 4. The coloring material which is superimposed upon the foundation layer soaks into the latter until it comes into proximity to the outer surface of the ware. The ware is then burned and, after the coating material is washed away the ware will be found to have around the topa design 5, corresponding to the design 3, while around the bottom or base there will be a decorative stain 6, of a character depending upon the character of the treatment to the lower portion 4, of the bowl; the designs or decorations being in the form of rmanent stains.

It will of course be un erstood that the particular illustration just given is intended only to explain the manner ofcarrying out my invention and not intended to define a limited scope; as it will be understood that an infinite variety of decorative effects may be produced by my process. I therefore do not desire to be limited except as indicated in tlie definitions of my invention constitutbe decorated, then ap lylng upon the coating a coloring materla in a condition which permits 1t to penetrate said coating, and then burning or baking.

2. The process of decorating lass or ce-, ramic ware which consists in app ying to the surface to bedecorated a clay-like stainng coating in the usual way, then apply ing upon the coating a staining material adapted to penetrate the coating and modify the staining effect thereof in the subsequent treatment, and then burning or baking.

3. The process of decorating lass or ceramic ware which consists in app ying to the surface to be decorated a suitable clay-like foundation, then applying upon said foundation one or more metallic salts or bases in a condition to penetrate the foundation material, and then burning or baking and finishing in the usual way. In testimony whereof, I sign this specification.

I JOHN W. HASBURG 

